Botanical Name: Brassica oleracea var. alboglabra
Days to Maturity: 60–70 days
Native: Probably East Asia
Hardiness: Frost-tolerant annual
Plant Dimensions: 24"–30" tall, 18" wide
Variety Information: Thick, wide, blue-green leaves on asparagus-like stalks, with small flowerheads of blue-green buds that look like small broccoli heads or side-shoots.
Attributes: Good for Containers, Heat Tolerant
When to Sow Outside: RECOMMENDED. 1 to 2 weeks before your average last frost date. Also, in late summer or winter for cool-season harvest. Mild Climates: Sow in fall or winter for a cool-season harvest. Optimal soil temperature for germination is 60°–85°F.
When to Start Inside: Not recommended; transplants tend to bolt (prematurely flower).
Days to Emerge: 10–20 days
Seed Depth: ½"
Seed Spacing: A group of 3 seeds every 8"–10"
Row Spacing: 18"–24"
Thinning: When 2" tall, thin to 1 every 8" – 10"
Harvesting: Harvest in early morning if possible. Pick the center bud stalks first; side branches will continue to produce more flower buds for additional harvesting, or leaves and stems may be harvested without florets. Whole plants can be harvested just before first flower buds open if desired.